I have never made a curry using a slow cooker, I'm interested in the different methods . I don't think I'm going to change my method though ,which is cumin seeds to start with cooked until splitting, then add finely chopped peppers, onions, garlic, ginger and chillies, cook for 6 minutes. Add curry paste ,dry coriander and cumin powder, also a few drops of hot water.
cook for couple of minutes. Then add whatever meat or prawns, cook for 5 mins. Then add tin or fresh tomatoes , fresh coriander, simmer for 15mins , then serve. Delicious